PHP Manual: Legendre symbol

Description

int gmp_legendre ( GMP $a , GMP $p )

Compute the » Legendre symbol of a and p. p should be odd and must be positive.

Parameters

a

Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.

p

Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.

Should be odd and must be positive.

Return Values

A GMP number resource in PHP 5.5 and earlier, or a GMP object in PHP 5.6 and later.

Examples

Example #1 gmp_legendre example


<?php
echo gmp_legendre("1", "3") . "\n";
echo gmp_legendre("2", "3") . "\n";
?>

The above example will output:

1
0